Trying different voice by tube with adapter. Needn't change amplifier anything
Liquid epoxy Resin encapsulation to ensure the perfect shielding property
100% The polytetrafluoroethylene(Teflon) and Silver-Plated Wire. Specialty:high temperature resistance
Top 8pin tube saver pin is 360° surround your tube pin.
Every tube pin is a thick gold-plated copper column, not a very thin sheet metal.
The upper half of each copper column is cut 5 times to form 6 copper bar units.
More flexible than uncut copper columns.